Helmuth Fischer should not be confused with Helmut Fischer.
| Birth Date: | 29 January 1911 |
| Birth Place: | Bremerhaven, Germany |
| Sport: | Swimming |
| Club: | Bremischer Schwimmverband |
| Show-Medals: | yes |
Helmuth Fischer (29 January 1911 – 29 February 1996) was a German swimmer who won a silver medal in the 100 m freestyle at the 1934 European Aquatics Championships. He also competed at the 1936 Summer Olympics and finished fifth in the 100 m freestyle and 4 × 200 m freestyle relay.